I hate napping. I’m one of few, I know, but for some reason I just detest sleeping during the day unless I’m sick. I’ll lie in bed and veg, but I can’t sleep till 10pm at the earliest. I also usually have nightmares (daymares?) if I sleep during the day, which I guess could be part of my aversion to napping!
I don’t think it’s actually bad for you though, especially if you do like @Marina says and make it a regular time and regular length and can still sleep at night. :)